/Engine/Plugins/Runtime/Metasound/Source/MetasoundFrontend/Public/MetasoundFrontendDocumentModifyDelegates.h
struct FInterfaceModifyDelegates
FOnMetaSoundFro...
OnInputAdded
FOnMetaSoundFro...
OnInterfaceAdded
FOnMetaSoundFro...
OnOutputAdded
FOnMetaSoundFro...
OnRemovingInput
FOnMetaSoundFro...
OnRemovingInterface
FOnMetaSoundFro...
OnRemovingOutput